我随机设置了4个图像,但是当我测试它时,结果显示相同的图片。我希望每个图像视图都能显示与其他图像不同的图像。
这是我的代码:
UIFocusUpdateContext
答案 0 :(得分:2)
查看代码,用相同的图像替换所有4张照片(例如" img1"或" img2"或" img3"或&#34 ; IMG4&#34)
如果你想用不同的图像替换4 pic,只需调用:
int rndInt = rand.nextInt(4) + 1;
String imgName = "img" + rndInt;
int id = getResources().getIdentifier(imgName, "drawable", getPackageName());
每次在将资源ID分配给ImageView之前。
创建一个函数,例如:
private int getRandomImage() {
int rndInt = rand.nextInt(4) + 1;
String imgName = "img" + rndInt;
return getResources().getIdentifier(imgName, "drawable", getPackageName());
}
并调用每个ImageView
pic1.setImageResource(getRandomImage());
pic2.setImageResource(getRandomImage());
pic3.setImageResource(getRandomImage());
pic4.setImageResource(getRandomImage());
修改强>
如果你想拥有4个不同的图像,可以用以下方法更改getRandomImage():
List<Integer> listImageUsed = new ArrayList<Integer>();
private int getRandomImage() {
int rndInt;
do {
rndInt = rand.nextInt(4) + 1;
} while (!listImageUsed.contains(rndInt));
listImageUsed.add(rndInt);
String imgName = "img" + rndInt;
return getResources().getIdentifier(imgName, "drawable", getPackageName());
}
答案 1 :(得分:2)
这是我的回答,其他的尝试只显示4个不同的图像。我的解决方案提供的图像是随机的,不相同:
final ImageButton imageButton=(ImageButton) findViewById(R.id.imageView);
imageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
imageButton.setVisibility(View.INVISIBLE);
pic1 = (ImageView) findViewById(R.id.imageView2);
pic2 = (ImageView) findViewById(R.id.imageView3);
pic3 = (ImageView) findViewById(R.id.imageView4);
pic4 = (ImageView) findViewById(R.id.imageView5);
ArrayList<Integer> imageIds= new ArrayList<>(Arrays.asList(1, 2, 3, 4))
Collections.shuffle(imageIds);
pic1.setImageResource(getResources().getIdentifier("img" + imageIds[0], "drawable", getPackageName()));
pic2.setImageResource(getResources().getIdentifier("img" + imageIds[1], "drawable", getPackageName()));
pic3.setImageResource(getResources().getIdentifier("img" + imageIds[2], "drawable", getPackageName()));
pic4.setImageResource(getResources().getIdentifier("img" + imageIds[3], "drawable", getPackageName()));
}
});
此外,您不必更改大部分代码以使其正常工作;) 对不起,我把所有东西都装在一行。但是我在德国真的很累,现在快到午夜了。
答案 2 :(得分:0)
这是相同的图像因为&#34; id&#34;只设置一次,以获得差异。您必须生成更多随机数。你需要调用rand.nextInt(4)四次。在每个&#34; .setImageResource(id)&#34;
之后只是为了给你一个想法。
Random rand = new Random();
int rndInt = rand.nextInt(4) + 1;
String imgName = "img" + rndInt;
int id = getResources().getIdentifier(imgName, "drawable", getPackageName());
pic1.setImageResource(id);
//Here you re-generate a random number
rndInt = rand.nextInt(4) + 1;
imgName = "img" + rndInt;
id = getResources().getIdentifier(imgName, "drawable", getPackageName());
pic2.setImageResource(id);
答案 3 :(得分:0)
final ImageButton imageButton=(ImageButton) findViewById(R.id.imageView);
imageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
imageButton.setVisibility(View.INVISIBLE);
pic1 = (ImageView) findViewById(R.id.imageView2);
pic2 = (ImageView) findViewById(R.id.imageView3);
pic3 = (ImageView) findViewById(R.id.imageView4);
pic4 = (ImageView) findViewById(R.id.imageView5);
setRandomImage(pic1);
setRandomImage(pic2);
setRandomImage(pic3);
setRandomImage(pic4);
}
});
private void setRandomImage(ImageView imgView)
{
Random rand = new Random();
int rndInt = rand.nextInt(4) + 1;
String imgName = "img" + rndInt;
int id = getResources().getIdentifier(imgName, "drawable", getPackageName());
imgView.setImageResource(id);
}